package com.elegantsoft.pakistannews;

import android.content.Context;
import android.graphics.Typeface;

public final class Farsi {

	public static boolean isFarsiConversionNeeded = true;

	private final static String szLamAndAlef = Character
			.toString((char) 0xfedf) + Character.toString((char) 0xfe8e); // Lam
																			// +
																			// Alef

	private final static String szLamStickAndAlef = Character
			.toString((char) 0xfee0) + Character.toString((char) 0xfe8e); // Lam
																			// (Sticky
																			// !!!)+
																			// Alef

	private final static String szLa = Character.toString((char) 0xfefb); // La
	private final static String szLaStick = Character.toString((char) 0xfefc); // La
																				// (Sticky!!!)

	private final static String szLamAndAlefWoosim = Character
			.toString((char) 0xe1) + Character.toString((char) 0xbb); // Lam +
																		// Alef

	private final static String szLamStickAndAlefWoosim = Character
			.toString((char) 0x90) + Character.toString((char) 0xbb); // Lam
																		// (Sticky
																		// !!!)+
																		// Alef

	private final static String szLaWoosim = Character.toString((char) 0xd9); // La
	private final static String szLaStickWoosim = Character
			.toString((char) 0xd9); // La

	// (Sticky!!!)

	private static final class struc {
		public char character;
		public char endGlyph;
		public char iniGlyph;
		public char midGlyph;
		public char isoGlyph;

		public struc(char Character, char EndGlyph, char IniGlyph,
				char MidGlyph, char IsoGlyph) {
			character = Character;
			endGlyph = EndGlyph;
			iniGlyph = IniGlyph;
			midGlyph = MidGlyph;
			isoGlyph = IsoGlyph;
		}
	}

	static struc[] arrStruc = {
			new struc((char) 0x630, (char) 0xfeac, (char) 0xfeab,
					(char) 0xfeac, (char) 0xfeab),
			new struc((char) 0x62f, (char) 0xfeaa, (char) 0xfea9,
					(char) 0xfeaa, (char) 0xfea9),
			new struc((char) 0x62c, (char) 0xfe9e, (char) 0xfe9f,
					(char) 0xfea0, (char) 0xfe9d),
			new struc((char) 0x62d, (char) 0xfea2, (char) 0xfea3,
					(char) 0xfea4, (char) 0xfea1),
			new struc((char) 0x62e, (char) 0xfea6, (char) 0xfea7,
					(char) 0xfea8, (char) 0xfea5),
			new struc((char) 0x647, (char) 0xfeea, (char) 0xfeeb,
					(char) 0xfeec, (char) 0xfee9),
			new struc((char) 0x639, (char) 0xfeca, (char) 0xfecb,
					(char) 0xfecc, (char) 0xfec9),
			new struc((char) 0x63a, (char) 0xfece, (char) 0xfecf,
					(char) 0xfed0, (char) 0xfecd),
			new struc((char) 0x641, (char) 0xfed2, (char) 0xfed3,
					(char) 0xfed4, (char) 0xfed1),
			new struc((char) 0x642, (char) 0xfed6, (char) 0xfed7,
					(char) 0xfed8, (char) 0xfed5),
			new struc((char) 0x62b, (char) 0xfe9a, (char) 0xfe9b,
					(char) 0xfe9c, (char) 0xfe99),
			new struc((char) 0x635, (char) 0xfeba, (char) 0xfebb,
					(char) 0xfebc, (char) 0xfeb9),
			new struc((char) 0x636, (char) 0xfebe, (char) 0xfebf,
					(char) 0xfec0, (char) 0xfebd),
			new struc((char) 0x637, (char) 0xfec2, (char) 0xfec3,
					(char) 0xfec4, (char) 0xfec1),
			new struc((char) 0x643, (char) 0xfeda, (char) 0xfedb,
					(char) 0xfedc, (char) 0xfed9),
			new struc((char) 0x645, (char) 0xfee2, (char) 0xfee3,
					(char) 0xfee4, (char) 0xfee1),
			new struc((char) 0x646, (char) 0xfee6, (char) 0xfee7,
					(char) 0xfee8, (char) 0xfee5),
			new struc((char) 0x62a, (char) 0xfe96, (char) 0xfe97,
					(char) 0xfe98, (char) 0xfe95),
			new struc((char) 0x627, (char) 0xfe8e, (char) 0xfe8d,
					(char) 0xfe8e, (char) 0xfe8d),
			new struc((char) 0x644, (char) 0xfede, (char) 0xfedf,
					(char) 0xfee0, (char) 0xfedd),
			new struc((char) 0x628, (char) 0xfe90, (char) 0xfe91,
					(char) 0xfe92, (char) 0xfe8f),
			new struc((char) 0x64a, (char) 0xfef2, (char) 0xfef3,
					(char) 0xfef4, (char) 0xfef1),
			new struc((char) 0x633, (char) 0xfeb2, (char) 0xfeb3,
					(char) 0xfeb4, (char) 0xfeb1),
			new struc((char) 0x634, (char) 0xfeb6, (char) 0xfeb7,
					(char) 0xfeb8, (char) 0xfeb5),
			new struc((char) 0x638, (char) 0xfec6, (char) 0xfec7,
					(char) 0xfec8, (char) 0xfec5),
			new struc((char) 0x632, (char) 0xfeb0, (char) 0xfeaf,
					(char) 0xfeb0, (char) 0xfeaf),
			new struc((char) 0x648, (char) 0xfeee, (char) 0xfeed,
					(char) 0xfeee, (char) 0xfeed),
			new struc((char) 0x629, (char) 0xfe94, (char) 0xfe93,
					(char) 0xfe93, (char) 0xfe93),
			new struc((char) 0x649, (char) 0xfef0, (char) 0xfeef,
					(char) 0xfef0, (char) 0xfeef),
			new struc((char) 0x631, (char) 0xfeae, (char) 0xfead,
					(char) 0xfeae, (char) 0xfead),
			new struc((char) 0x624, (char) 0xfe86, (char) 0xfe85,
					(char) 0xfe86, (char) 0xfe85),
			new struc((char) 0x621, (char) 0xfe80, (char) 0xfe80,
					(char) 0xfe80, (char) 0xfe80),
			new struc((char) 0x626, (char) 0xfe8a, (char) 0xfe8b,
					(char) 0xfe8c, (char) 0xfe89),
			new struc((char) 0x623, (char) 0xfe84, (char) 0xfe83,
					(char) 0xfe84, (char) 0xfe83),
			new struc((char) 0x622, (char) 0xfe82, (char) 0xfe81,
					(char) 0xfe82, (char) 0xfe81),
			new struc((char) 0x625, (char) 0xfe88, (char) 0xfe87,
					(char) 0xfe88, (char) 0xfe87),
			new struc((char) 0x67e, (char) 0xfb57, (char) 0xfb58,
					(char) 0xfb59, (char) 0xfb56), // peh
			new struc((char) 0x686, (char) 0xfb7b, (char) 0xfb7c,
					(char) 0xfb7d, (char) 0xfb7a), // cheh
			new struc((char) 0x698, (char) 0xfb8b, (char) 0xfb8a,
					(char) 0xfb8b, (char) 0xfb8a), // jeh
			new struc((char) 0x6a9, (char) 0xfb8f, (char) 0xfb90,
					(char) 0xfb91, (char) 0xfb8e), // keheh
			new struc((char) 0x6af, (char) 0xfb93, (char) 0xfb94,
					(char) 0xfb95, (char) 0xfb92), // gaf
			// new struc((char) 0x6cc, (char) 0xfbfd, (char) 0xfbfe,
			// (char) 0xfbff, (char) 0xfbfc), // Farsi yeh
			new struc((char) 0x6cc, (char) 0xfbfd, (char) 0xfef3,
					(char) 0xfef4, (char) 0xfbfc), // Arabic yeh
			new struc((char) 0x6c0, (char) 0xfba5, (char) 0xfba4,
					(char) 0xfba5, (char) 0xfba4) // heh with yeh
	};

	static struc[] arrStrucWoosim = {
			new struc((char) 0x630, (char) 0xb5, (char) 0x82, (char) 0xb5,
					(char) 0x82),
			new struc((char) 0x62f, (char) 0xb4, (char) 0x81, (char) 0xb4,
					(char) 0x81),
			new struc((char) 0x62c, (char) 0x9b, (char) 0xb1, (char) 0xf9,
					(char) 0xbf),
			new struc((char) 0x62d, (char) 0x9c, (char) 0xb2, (char) 0xfa,
					(char) 0xc0),
			new struc((char) 0x62e, (char) 0x9d, (char) 0xb3, (char) 0xfe,
					(char) 0xc1),
			new struc((char) 0x647, (char) 0xac, (char) 0xe4, (char) 0x93,
					(char) 0xd5),
			new struc((char) 0x639, (char) 0xc9, (char) 0xd3, (char) 0x8b,
					(char) 0xa4),
			new struc((char) 0x63a, (char) 0xca, (char) 0xdd, (char) 0x8c,
					(char) 0xa5),
			new struc((char) 0x641, (char) 0xa6, (char) 0xde, (char) 0x8d,
					(char) 0xcc),
			new struc((char) 0x642, (char) 0xa7, (char) 0xdf, (char) 0x8e,
					(char) 0xce),
			new struc((char) 0x62b, (char) 0xbd, (char) 0xaf, (char) 0xea,
					(char) 0x99),
			new struc((char) 0x635, (char) 0xc4, (char) 0xc8, (char) 0x87,
					(char) 0xa0),
			new struc((char) 0x636, (char) 0xc5, (char) 0xcb, (char) 0x88,
					(char) 0xa1),
			new struc((char) 0x637, (char) 0xc6, (char) 0xcd, (char) 0xcd,
					(char) 0xa2),
			new struc((char) 0x643, (char) 0xcf, (char) 0xe0, (char) 0x8f,
					(char) 0xa8),
			new struc((char) 0x645, (char) 0xd2, (char) 0xe2, (char) 0x91,
					(char) 0xaa),
			new struc((char) 0x646, (char) 0xd4, (char) 0xe3, (char) 0x92,
					(char) 0xab),
			new struc((char) 0x62a, (char) 0xbd, (char) 0xaf, (char) 0xea,
					(char) 0x99),
			new struc((char) 0x627, (char) 0xbb, (char) 0x80, (char) 0xbb,
					(char) 0x80),
			new struc((char) 0x644, (char) 0xd1, (char) 0xe1, (char) 0x90,
					(char) 0xa9),
			new struc((char) 0x628, (char) 0xbc, (char) 0xae, (char) 0xe9,
					(char) 0x98),
			new struc((char) 0x64a, (char) 0xdc, (char) 0xe6, (char) 0x95,
					(char) 0xdc),
			new struc((char) 0x633, (char) 0xc2, (char) 0xb8, (char) 0xb8,
					(char) 0x9e),
			new struc((char) 0x634, (char) 0xc3, (char) 0xb9, (char) 0xb9,
					(char) 0x9f),
			new struc((char) 0x638, (char) 0xc7, (char) 0xcd, (char) 0xcd,
					(char) 0xc7),
			new struc((char) 0x632, (char) 0xb7, (char) 0xb7, (char) 0xb7,
					(char) 0xb7),
			new struc((char) 0x648, (char) 0x94, (char) 0x94, (char) 0x94,
					(char) 0x94),
			new struc((char) 0x629, (char) 0xda, (char) 0xda, (char) 0xda,
					(char) 0xda),
			new struc((char) 0x649, (char) 0xdc, (char) 0xe6, (char) 0x95,
					(char) 0xdc),
			new struc((char) 0x631, (char) 0xb6, (char) 0xb6, (char) 0xb6,
					(char) 0xb6),
			new struc((char) 0x624, (char) 0xe7, (char) 0xe7, (char) 0xe7,
					(char) 0xe7),
			new struc((char) 0x621, (char) 0xba, (char) 0xba, (char) 0xba,
					(char) 0xba),
			new struc((char) 0x626, (char) 0xd7, (char) 0xe8, (char) 0x97,
					(char) 0xd7),
			new struc((char) 0x623, (char) 0x80, (char) 0x80, (char) 0x80,
					(char) 0x80),
			new struc((char) 0x622, (char) 0x80, (char) 0x80, (char) 0x80,
					(char) 0x80),
			new struc((char) 0x625, (char) 0x80, (char) 0x80, (char) 0x80,
					(char) 0x80),
			new struc((char) 0x67e, (char) 0xbc, (char) 0xae, (char) 0xe9,
					(char) 0x98), // peh
			new struc((char) 0x686, (char) 0x9b, (char) 0xb1, (char) 0xf9,
					(char) 0xbf), // cheh
			new struc((char) 0x698, (char) 0xb7, (char) 0xb7, (char) 0xb7,
					(char) 0xb7), // jeh
			new struc((char) 0x6a9, (char) 0xcf, (char) 0xe0, (char) 0x8f,
					(char) 0xa8), // keheh
			new struc((char) 0x6af, (char) 0xcf, (char) 0xe0, (char) 0x8f,
					(char) 0xa8), // gaf
			new struc((char) 0x6cc, (char) 0xdc, (char) 0xe6, (char) 0x95,
					(char) 0xdc), // yeh
			new struc((char) 0x6c0, (char) 0xac, (char) 0xe4, (char) 0x93,
					(char) 0xd5) // heh with yeh
	};

	private static final int N_DISTINCT_CHARACTERS = 43;

	private static final String ArabicReverse(String s) {
		try {
			String Out = "", rev;
			s = MakeReverse(s);
			char[] chs = new char[s.length()];
			chs = s.toCharArray();
			int i = 0;
			while (i < s.length()) {
				if ((chs[i] >= '0' && chs[i] <= '9')) // isDigit(s[i]) ?
				{
					rev = "";
					while (i < s.length()
							&& ((chs[i] >= '0' && chs[i] <= '9') || chs[i] == '/')) // isDigit(s[i])
																					// ?
					{
						rev = rev + chs[i];
						++i;
					}
					rev = MakeReverse(rev);
					Out = Out + rev;
				} else {
					Out = Out + chs[i];
					++i;
				}
			}
			s = Out;
		} catch (Exception ex) {
			// throw new Exception(
			// "An exception has occurred in ArabicReverse function.\\n"
			// + ex.getMessage());
		}
		return s;
	}

	private static final boolean isFromTheSet1(/* WCHAR */char ch) {
		char[] theSet1 = new char[] { (char) 0x62c, (char) 0x62d, (char) 0x62e,
				(char) 0x647, (char) 0x639, (char) 0x63a, (char) 0x641,
				(char) 0x642, (char) 0x62b, (char) 0x635, (char) 0x636,
				(char) 0x637, (char) 0x643, (char) 0x645, (char) 0x646,
				(char) 0x62a, (char) 0x644, (char) 0x628, (char) 0x64a,
				(char) 0x633, (char) 0x634, (char) 0x638, (char) 0x67e,
				(char) 0x686, (char) 0x6a9, (char) 0x6af, (char) 0x6cc,
				(char) 0x626 };
		int i = 0;
		while (i < 28) {
			if (ch == theSet1[i])
				return true;
			++i;
		}
		return false;
	}

	private static final boolean isFromTheSet2(/* WCHAR */char ch) {
		char[] theSet2 = new char[] { (char) 0x627, (char) 0x623, (char) 0x625,
				(char) 0x622, (char) 0x62f, (char) 0x630, (char) 0x631,
				(char) 0x632, (char) 0x648, (char) 0x624, (char) 0x629,
				(char) 0x649, (char) 0x698, (char) 0x6c0 };
		int i = 0;
		while (i < 14) {
			if (ch == theSet2[i])
				return true;
			++i;
		}
		return false;
	}

	private static final String MakeReverse(String text) {
		String Result = "";
		char[] Ctext = new char[text.length()];
		Ctext = text.toCharArray();
		for (int i = (text.length()) - 1; i >= 0; i--) {
			Result += Ctext[i];
		}
		return Result;
	}

	public static final String ConvertBackToRealFarsi(String In) {

		if (!isFarsiConversionNeeded) {
			return In;
		}

		String strOut = "";
		StringBuilder strBuilder = new StringBuilder("");
		int i = 0;
		int j = 0;
		char[] chIn = new char[In.length()];
		chIn = In.toCharArray();

		for (i = 0; i < In.length(); i++) {
			boolean found = false;
			for (j = 0; j < arrStruc.length; j++) {
				if (chIn[i] == arrStruc[j].midGlyph
						|| chIn[i] == arrStruc[j].iniGlyph
						|| chIn[i] == arrStruc[j].endGlyph
						|| chIn[i] == arrStruc[j].isoGlyph) {
					strBuilder.append(arrStruc[j].character);
					found = true;
					break;
				}
			}
			if (!found)
				strBuilder.append(chIn[i]);
		}

		strOut = strBuilder.toString();
		strOut = strOut.replace(szLa, "لا");
		strOut = strOut.replace(szLaStick, "لا");

		return strOut;
	}

	public static final String Convert(String In) {

		if (!isFarsiConversionNeeded) {
			return In;
		}

		if (In == null) {
			return "";
		}

		boolean linkBefore, linkAfter;
		String Out = In;
		char[] chOut = new char[Out.length()];
		chOut = Out.toCharArray();
		char[] chIn = new char[In.length()];
		chIn = In.toCharArray();

		for (int i = 0; i < In.length(); i++) {
			/* WCHAR */
			char ch = chIn[i];
			if ((ch >= (char) 0x0621 && ch <= (char) 0x064a)
					|| (ch == (char) 0x067e) || (ch == (char) 0x0686)
					|| (ch == (char) 0x0698) || (ch == (char) 0x06a9)
					|| (ch == (char) 0x06af) || (ch == (char) 0x06cc)
					|| (ch == (char) 0x06c0)) // is a Farsi character?
			{
				int idx = 0;
				while (idx < N_DISTINCT_CHARACTERS) {
					if (arrStruc[idx].character == chIn[i])
						break;
					++idx;
				}

				if (i == In.length() - 1)
					linkAfter = false;
				else
					linkAfter = (isFromTheSet1(chIn[i + 1]) || isFromTheSet2(chIn[i + 1]));
				if (i == 0)
					linkBefore = false;
				else
					linkBefore = isFromTheSet1(chIn[i - 1]);
				if (idx < N_DISTINCT_CHARACTERS) {
					if (linkBefore && linkAfter)
						chOut[i] = arrStruc[idx].midGlyph;
					if (linkBefore && !linkAfter)
						chOut[i] = arrStruc[idx].endGlyph;
					if (!linkBefore && linkAfter)
						chOut[i] = arrStruc[idx].iniGlyph;
					if (!linkBefore && !linkAfter)
						chOut[i] = arrStruc[idx].isoGlyph;
				} else {
					chOut[i] = chIn[i];
				}
			} else {
				chOut[i] = chIn[i];
			}
		}
		Out = "";
		for (int j = 0; j < chOut.length; j++)
			Out += chOut[j];
		// Out = ArabicReverse(Out);

		Out = Out.replace((char) 0x200c, ' '); // Change NO SPACE to SPACE

		Out = Out.replace(szLamAndAlef, szLa); // Join 'Lam' and 'Alef' and
												// make 'La'
		Out = Out.replace(szLamStickAndAlef, szLaStick); // Join 'Lam Stick'
															// and 'Alef'
															// and make 'La
															// Stick'

		return reorderWords(Out);

	}

	private final static String reorderWords(String strIn) {

		final int ST_RTL = 0;
		final int ST_LTR = 1;

		String strOut = "";
		String prevWord = "";
		int state = ST_RTL;
		char[] arr = strIn.toCharArray();
		int i = 0;
		while (i < arr.length) {
			if (charIsLTR(arr[i]) && state != ST_LTR) {
				// state changed to LTR
				state = ST_LTR;
				strOut = prevWord + strOut;
				prevWord = "";
				prevWord += arr[i];
			} else if (charIsRTL(arr[i]) && state != ST_RTL) {
				// state changed to RTL
				state = ST_RTL;
				strOut = prevWord + strOut;
				prevWord = "";
				prevWord += arr[i];
			} else {
				// state is not changed
				prevWord += arr[i];
			}
			i++;
		}

		strOut = prevWord + strOut;

		return strOut;

	}

	private final static boolean charIsLTR(char ch) {
		return (ch >= (char) 65 & ch <= (char) 122) | Character.isDigit(ch);
	}

	private final static boolean charIsRTL(char ch) {
		return ch >= (char) 0x0621;
	}

	private static Typeface typeface;

	public static final Typeface GetFarsiFont(Context context) {
		if (typeface == null) {
			typeface = Typeface.createFromAsset(context.getAssets(),
			// "DroidSansFallback.ttf");
					"tahoma.ttf");
		}
		return typeface;
	}
}